JEE Main 20203 SeptemberEvening Shift

Exam: JEE Main
Year: 2020
Date: 3 September
Shift: Evening Shift
Subject: Chemistry
Chapter: Haloalkanes and Haloarenes

JEE Main 2020 · 3 September · Evening Shift · Chemistry · Haloalkanes and Haloarenes

The decreasing order of reactivity of the following compounds...

The decreasing order of reactivity of the following compounds towards nucleophilic substitution ( ${S}_{N}2$ ) is:

The decreasing order of reactivity of the following compounds towards nucleophilic substitution ( S _ N 2 ) is:

Options

A(II) > (III) > (I) > (IV)
B(II) > (III) > (IV) > (I)
C(III) > (II) > (IV) > (I)
D(IV) > (II) > (III) > (I)

Correct answer

B. (II) > (III) > (IV) > (I)

Step-by-step solution

Rateof{S}_{N}2reation\alpha Electrophilicityofalkylcarbon\alpha\dfrac{1}{StericcrowdingonR - X} $</p><p>$ {S}_{N}2 $reaction depend upon$ - I, - M $, effect.$ - I, - M $group increases the rate of$ {S}_{N}2 reaction.

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